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Production method of special defoaming agent for water-based concentrated pigment color paste

The technology of a pigment paste and a production method is applied in the field of special defoamer for water-based concentrated pigment paste, and achieves the effects of rapid diffusion performance, enhanced diffusion capacity and good compatibility.

Pending Publication Date: 2021-06-22
江西三越新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is, in order to solve the existing problem of defoaming, propose a kind of production method of water-based concentrated pigment color paste special defoamer

Method used

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  • Production method of special defoaming agent for water-based concentrated pigment color paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of defoaming active substance A:

[0028] In a 500L stainless steel reactor, put 320Kg of simethicone oil with a viscosity of 200mpa.s, and the specific surface area of ​​28Kg is 300m 2 / g hydrophobically treated fumed silica, 2Kg coupling agent KH550, mix and heat up to 150~180°C.

[0029] Activation reaction for 4-6 hours, then cooled to 80-95°C, passed through the homogenizer twice at a pressure of 20-25Mpa and cooled to below 35°C to obtain the desired defoaming active substance A.

[0030] (2) Preparation of defoaming active substance B:

[0031] In a 500L stainless steel reactor, put 280Kg of low hydrogen-containing silicone oil with a molecular weight of 4000 and 100Kg of allyl polyether with a molecular weight of 380, mix and heat up to 100~110°C, then add 50ppm chloroplatinic acid, and keep warm at 110~150°C After the reaction is complete, the temperature of the mixed material is lowered to below 40°C, and the product obtained is the defoaming...

Embodiment 2

[0045] (1) Preparation of defoaming active substance A:

[0046] In a 500L stainless steel reactor, put 310Kg of simethicone oil with a viscosity of 100mpa.s, and the specific surface area of ​​32Kg is 300m 2 / g of hydrophobically treated fumed silica, 6Kg polyamide wax flakes, 2Kg coupling agent tetraisobutyl titanate; mix and heat up to 200°C, activate for 2-8 hours, then cool to 80-95°C, Pass through the homogenizer twice at a pressure of 20~22Mpa, and cool to below 35°C to obtain the desired defoaming active substance A.

[0047] (2) Preparation of defoaming active substance B:

[0048] In a 500L stainless steel reactor, put 260Kg of low hydrogen-containing silicone oil with a molecular weight of 2500 and 140Kg of allyl polyether with a molecular weight of 500; mix and heat up to 120~130°C, then add 30ppm chloroplatinic acid, and keep warm at 110~150°C After the reaction is complete, the temperature of the mixed material is lowered to below 40°C, and the product obtained ...

Embodiment 3

[0062] (1) Preparation of defoaming active substance A:

[0063] In a 500L stainless steel reactor, put 320Kg of simethicone oil with a viscosity of 200mpa.s, and the specific surface area of ​​28Kg is 150m 2 / g precipitated silica, 2Kg coupling agent KH550, mix and heat up to 150~180°C

[0064] Activation reaction for 4-6 hours, then cooled to 80-95°C, passed through the homogenizer twice at a pressure of 20-25Mpa and cooled to below 35°C to obtain the desired defoaming active substance A.

[0065] (2) Preparation of antifoaming active substance B: the preparation process is the same as that in Example 1.

[0066] (3) Preparation of the finished defoamer: the preparation process is the same as in Example 1.

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Abstract

The invention relates to a production method of a special defoaming agent for water-based concentrated pigment color paste. The defoaming agent comprises a defoaming active substance A, a defoaming active substance B, a defoaming synergistic substance, an emulsifier, an emulsion stabilizer and water. The production method of the defoaming agent comprises the following steps: adding the defoaming active substance A, the defoaming active substance B, the defoaming synergistic substance and the emulsifier into an emulsifying kettle, and stirring at 20-80 DEG C for 2-4 hours; gradually adding water into the mixture obtained in the previous step, and completing transfer emulsification; then adding the emulsion stabilizer; and finally, feeding the emulsion obtained in the previous step into a colloid mill, grinding for two to three times, cooling and discharging. According to the preparation method, an original staged temperature changing and water adding emulsification process is adopted, and a cloud point transfer process is ingeniously applied; the particle size curve of the prepared emulsion is in 'bimodal' distribution, the unique particle size distribution mode ensures the rapid diffusion performance, excellent defoaming property and durability of the defoaming agent, and the shrinkage resistance is also improved to a certain extent.

Description

technical field [0001] The invention relates to a production method of a special defoamer for water-based concentrated pigment paste, belonging to the technical field of defoamers. Background technique [0002] In the preparation of water-based color paste, especially in the process of pigment concentrated color paste, a large amount of foam will be generated no matter in the pre-dispersion process of dispersant or in the later high-speed grinding process; , storage have brought great negative impact. Specifically in: [0003] (1) During the pre-dispersion process, the foam generated in the dispersion cylinder will affect the dispersion operation and occupy the effective volume; (2) During the grinding process, a large amount of foam entrained in the color paste will reduce the grinding efficiency, and the bubbles at high speed will cause "Cavitation", which affects the service life of the equipment; (3) A large amount of foam during the filling process will also affect th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409B01D19/0413B01D19/0404
Inventor 袁志军余建新李福强陈建阳
Owner 江西三越新材料有限公司
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